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Restructuring and Other Charges - Summary of 2015 Restructuring Impacts on Reportable Segment Income by Line of Business (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Jun. 30, 2017 | Jul. 01, 2016 | Jun. 30, 2017 | Jul. 01, 2016
Restructuring Charges [Line Items] |  |  |  |
Restructuring Charges | $ 9,454 | $ 32,920 | $ 92,061 | $ 136,671
Operating Segments | Aerospace & Technology |  |  |  |
Restructuring Charges [Line Items] |  |  |  |
Restructuring Charges |  | 1,924 | 1,004 | 4,359
Operating Segments | Buildings & Infrastructure |  |  |  |
Restructuring Charges [Line Items] |  |  |  |
Restructuring Charges | 7,266 | 2,245 | 22,089 | 17,812
Operating Segments | Industrial |  |  |  |
Restructuring Charges [Line Items] |  |  |  |
Restructuring Charges | (220) | 1,658 | 9,268 | 21,551
Operating Segments | Petroleum & Chemicals |  |  |  |
Restructuring Charges [Line Items] |  |  |  |
Restructuring Charges | (458) | 21,774 | 28,917 | 74,789
Corporate Non-Segment |  |  |  |
Restructuring Charges [Line Items] |  |  |  |
Restructuring Charges | $ 2,866 | $ 5,319 | $ 30,783 | $ 18,160

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